Projection lamp

Abstract

The utility model provides a projection lamp which comprises a lamp shell, a circuit board and a heat dissipation block. Wherein the lamp shell is provided with a mounting cavity, the mounting cavity is provided with a circuit board, and the circuit board is provided with an LED chip capable of emitting light after being electrified; a heat dissipation block is arranged at the position, corresponding to the circuit board, of the lamp shell, a threaded hole is formed in the heat dissipation block, and the circuit board is connected with the threaded hole of the heat dissipation block through a threaded fastener. The lamp shell is provided with the heat dissipation block, so that the wall thickness of the position, where the circuit board is installed, of the lamp shell is increased, the circuit board can be fixed in the lamp shell through threaded fasteners, and the installation mode that the circuit board is fixed in the lamp shell through mucilage glue is abandoned; therefore, the problem that the circuit board falls off due to failure of the adhesive caused by over-high temperature when the circuit board is fixed by the adhesive is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lighting technical field especially, it relates to the projection lamp technical field. BACKGROUND

[0002] The projection lamp is the lamp for lighting, is often used for the illumination of large area area. The projection lamp usually adopts the circuit board with LED light emitting chip as light source, the circuit board supplies power to LED light emitting chip, and LED light emitting chip can emit light. However, since a large amount of heat is generated when LED light emitting chip is electrified and emits light, in order to dissipate heat, the lamp shell of the projection lamp is generally thin, and it is inconvenient to use screws to fix the circuit board, so the circuit board is usually fixed on the lamp shell by using adhesive, however, even if the design of thin lamp shell is adopted, the heat generated by the circuit board is easy to make the adhesive ineffective, so that the circuit board cannot be fixed and installed on the lamp shell. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. Therefore, the utility model provides a projection lamp, which can more stably fix the circuit board and improve the heat dissipation efficiency.

[0004] According to the projection lamp of the utility model first aspect embodiment, including: lamp shell, circuit board, heat dissipation block, wherein the lamp shell has installation cavity, the installation cavity is provided with circuit board, the circuit board is provided with the LED chip that can emit light by electrifying, the lamp shell is provided with heat dissipation block in the position corresponding with the circuit board, the heat dissipation block is opened with threaded hole, and the circuit board is connected with the threaded hole of the heat dissipation block by threaded fastener.

[0005] According to the projection lamp of the utility model embodiment, the lamp shell is provided with the heat dissipation block, the wall thickness of the position of the lamp shell installing the circuit board is increased, so that the circuit board can be fixed in the lamp shell by using threaded fastener, and the installation mode that the circuit board is fixed in the lamp shell by using adhesive is abandoned, thereby avoiding the problem that the adhesive fixing the circuit board is ineffective due to too high temperature, so that the circuit board falls off.

[0006] According to some embodiments of the utility model, the heat dissipation block is arranged on the outer bottom wall of the lamp shell, and the heat dissipation block and the lamp shell are an integral structure, the heat dissipation block is provided with heat dissipation fins on the outer wall, and the circuit board is tightly attached to the inner bottom wall of the installation cavity.

[0007] According to some embodiments of the utility model, the lamp shell is made of die casting or injection molding, and the lamp shell is provided with a light outlet communicating with the installation cavity; the LED chip on the circuit board faces the light outlet.

[0008] According to some embodiments of the utility model, the lamp shell has a mounting portion arranged circumferentially around the light outlet at the light outlet, a diffusion plate is arranged on the mounting portion, and the diffusion plate covers the light outlet.

[0009] According to some embodiments of the utility model, the mounting portion is provided with a mounting groove, and the diffusion plate is embedded in the mounting groove.

[0010] According to some embodiments of the utility model, a bottom wall of the mounting groove is provided with an annular groove arranged circumferentially around the light outlet, and when the diffusion plate is embedded in the mounting groove, the annular groove is filled with adhesive, and the diffusion plate is tightly attached to the bottom wall of the mounting groove through the adhesive.

[0011] According to some embodiments of the utility model, a first through hole is formed in a side wall of the mounting cavity, the circuit board is provided with a wire for connecting a power supply, the wire passes through the first through hole and extends to the outside of the lamp shell, a sealing ring is sleeved on the wire in the first through hole, and the sealing ring seals the gap between the wire and the first through hole.

[0012] According to some embodiments of the utility model, a second through hole is arranged on the mounting cavity, the second through hole is arranged on the side wall of the mounting cavity, a sealing plug is arranged in the second through hole, and the sealing plug blocks the second through hole.

[0013] According to some embodiments of the utility model, a light reflecting cup is arranged in the mounting cavity, the light reflecting cup is arranged between the circuit board and the diffusion plate, and the light reflecting cup is fixed by the inner wall of the mounting cavity, the circuit board and the diffusion plate.

[0014] According to some embodiments of the utility model, a mounting frame is further arranged, and the mounting portion is provided with a folded ear on each of two opposite sides, and the two ends of the mounting frame are rotationally connected with the two folded ears one by one.

[0015] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of an embodiment of the utility model;

[0017] Figure 2 is a front view of an embodiment of the utility model;

[0018] Figure 3 is Figure 2 A-A sectional view of

[0019] Reference numerals: Lamp housing 100; Mounting cavity 110; First through hole 111; Sealing ring 112; Second through hole 113; Sealing plug 114; Heat sink 120; Threaded hole 121; Light outlet 130; Mounting part 140; Mounting groove 141; Annular groove 143; Folded ear 150; Circuit board 200; Diffuser plate 300; Reflector cup 400; Mounting bracket 500. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the orientation descriptions, such as left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0023] like Figures 1 to 3 As shown, this embodiment provides a floodlight, including: a lamp housing 100, a circuit board 200, and a heat sink 120. The lamp housing 100 has a mounting cavity 110, on which the circuit board 200 is disposed. The circuit board 200 has an LED chip that emits light when powered. A heat sink 120 is disposed at a position corresponding to the circuit board 200 in the lamp housing 100. The heat sink 120 has a threaded hole 121, and the circuit board 200 is connected to the threaded hole 121 of the heat sink 120 via a threaded fastener. The lamp housing 100 is a housing with a cavity, and the cavity in the lamp housing 100 is the mounting cavity 110. The circuit board 200 has an LED chip that emits light when powered; when the circuit board 200 is powered on, the LED chip on the circuit board 200 illuminates. The heat sink 120, through its special structure, increases the contact area between the floodlight and the air, thereby improving heat dissipation efficiency. The heat sink 120 is located at the connection between the circuit board 200 and the lamp housing 100, and has a threaded hole 121. The lamp housing 100 has a corresponding notch, so that the circuit board 200 can be installed by using threaded fasteners such as bolts and screws, which improves the stability of the installation of the circuit board 200.

[0024] As Figures 1 to 3 shown, in some embodiments, the heat dissipation block 120 is arranged on the outer bottom wall of the lamp shell 100, and the heat dissipation block 120 and the lamp shell 100 are in an integral structure. The heat dissipation block 120 is arranged with heat dissipation fins on the outer wall, and the circuit board 200 is tightly arranged on the inner bottom wall of the mounting cavity 110. The heat dissipation block 120 and the outer bottom wall of the lamp shell 100 are in an integral structure, compared with a split structure, the process of mounting the heat dissipation block 120 to the lamp shell 100 and the connecting parts consumed are saved. Since the heat dissipation block 120 and the outer bottom wall of the lamp shell 100 are in an integral structure, the heat dissipation block 120 is arranged with heat dissipation fins on the outer wall, which actually means that the heat dissipation fins are arranged on the outer wall of the lamp shell 100. The heat dissipation fins and the lamp shell 100 are also in an integral structure. The heat dissipation fins increase the contact area with air to achieve the purpose of improving the heat dissipation efficiency, which is the structure for achieving the heat dissipation purpose of the heat dissipation block 120. The heat dissipation fins increase the contact area with air by arranging various shapes of protrusions. In this embodiment, the heat dissipation fins are arranged as long strip-shaped protrusions extending in the vertical direction and arranged along the horizontal direction. In this embodiment, the outer bottom wall of the lamp shell 100 is arranged with a folded threaded hole 121, so that the circuit board 200 can be tightly arranged on the inner bottom wall of the mounting cavity 110 even if the lamp shell 100 is thin, improving the installation stability of the circuit board 200. At the same time, the circuit board 200 is tightly arranged on the inner bottom wall of the mounting cavity 110, which can make the heat generated by LED light more quickly conduct to the heat dissipation fins for heat dissipation.

[0025] It should be noted that the heat dissipation fins are not limited to the form in this embodiment, and can also be arranged as other shaped protrusions. In some embodiments of the present application, the heat dissipation fins are arranged as circular ring protrusions, and a plurality of heat dissipation fins are arranged concentrically and at equal intervals, which can also achieve the effect of increasing the surface area of the heat dissipation block and improving the heat dissipation efficiency.

[0026] As Figures 1 to 3 shown, in some embodiments, the lamp shell 100 is formed by die casting or injection molding. The lamp shell 100 is arranged with a light outlet 130 communicating with the mounting cavity 110; the LED chips on the circuit board 200 are arranged towards the light outlet 130. The lamp shell 100 can be made of metal material by die casting, or can be made of plastic material by injection molding. By die casting or injection molding, the lamp shell 100 has a recessed mounting cavity 110 and a light outlet 130 located at the cavity opening, and the LED chips are arranged towards the light outlet 130. When the LED chips are lit, the light can be irradiated to the outside of the lamp shell 100 through the light outlet 130.

[0027] It needs to be particularly pointed out that the manufacturing process of the lamp shell 100 is specifically selected and determined according to the type of the material used. Specifically, when the lamp shell 100 decides to use plastic as the main component, the injection molding process is usually preferred in the production process. The injection molding process is widely used in the manufacturing field of plastic lamp shells due to its high efficiency, accuracy and ability to mass-produce complex-shaped products. Through this process, molten plastic can be injected into a pre-designed mold, and after cooling and solidification, a lamp shell 100 with the required shape and size can be obtained.

[0028] When the lamp shell 100 chooses metal as the manufacturing material, the manufacturing process will be adjusted accordingly to the die casting process. The die casting process injects molten metal into a mold under high pressure to quickly cool and solidify into a product of the desired shape. This process is particularly suitable for the production of metal lamp shells, as it can provide higher strength and better heat dissipation performance while maintaining the accuracy and details of the product. In the die casting process, the fluidity and filling properties of the metal material are fully utilized, ensuring the structural integrity and appearance quality of the lamp shell 100.

[0029] As shown in Figures 1 to 3 In some embodiments, the lamp shell 100 has a mounting portion 140 arranged circumferentially around the light outlet 130 at the light outlet 130, and a diffusion plate 300 is arranged on the mounting portion 140, covering the light outlet 130. The mounting portion 140 is a structure that is folded outward at the light outlet 130 when the lamp shell 100 is die cast or injection molded, and is an integral structure with the lamp shell 100. The diffusion plate 300 can cause the light passing through to be scattered. The diffusion plate 300 is mounted on the mounting portion 140 and covers the light outlet 130, causing the light emitted by the LED to be scattered when it exits the light projector, achieving a more soft effect of the light emitted by the light projector.

[0030] It needs to be pointed out that the material of the diffusion plate is not absolute, and in some embodiments of the present application, the material of the diffusion plate 300 can be selected from glass, plastic and other light-transmitting materials.

[0031] It needs to be pointed out that there are many ways to achieve the softening effect of light by the diffusion plate 300, for example, when the diffusion plate 300 is made of glass, it can be processed by sanding, or when the diffusion plate is made of plastic, light diffusing agents can be added during the mixing process.

[0032] As shown in Figures 1 to 3 In some embodiments, the mounting portion 140 is provided with a mounting groove 141, and the diffusion plate 300 is embedded in the mounting groove 141. The mounting groove 141 is arranged in the mounting portion 140, and the shape of the mounting groove 141 is consistent with the shape of the mounting surface of the diffusion plate 300, which is used to provide positioning for the installation of the diffusion plate 300.

[0033] As Figures 1 to 3 shown, in some embodiments, the bottom wall of the mounting groove 141 is provided with an annular groove 143 arranged circumferentially around the light outlet 130. When the diffuser plate 300 is embedded in the mounting groove 141, the annular groove 143 is filled with adhesive, and the diffuser plate 300 is tightly attached to the bottom wall of the mounting groove 141 by the adhesive. The annular groove 143 is a groove provided on the bottom wall of the mounting groove 141 around the light outlet 130. When the diffuser plate 300 is installed, the annular groove 143 is filled with adhesive, and the diffuser plate 300 is placed in the mounting groove 141. The adhesive will bond the diffuser plate 300 and the mounting groove 141, achieving the effect of fixing the diffuser plate 300 in the mounting groove 141. At the same time, after the adhesive solidifies, it will seal the gap between the diffuser plate 300 and the bottom wall of the mounting groove 141, achieving the effect of waterproofing.

[0034] It should be noted that the number of annular grooves 143 is not fixed, but can be flexibly adjusted according to actual design requirements and application scenarios.

[0035] Specifically, in this embodiment, we only set one annular groove 143. As long as the effective filling and solidification of the adhesive can be ensured, a certain installation strength and waterproof effect can be achieved.

[0036] However, in some other embodiments, we choose to set two or more annular grooves 143. This design not only increases the filling area of the adhesive and improves the tightness between the diffuser plate 300 and the mounting groove 141, but also further enhances the overall installation strength and waterproof performance.

[0037] As Figures 1 to 3 shown, in some embodiments, the side wall of the mounting cavity 110 is provided with a first through hole 111, and the circuit board 200 is provided with a wire for connecting the power supply. The wire passes through the first through hole 111 and extends to the outside of the lamp housing 100. The wire is sleeved with a sealing ring 112 located in the first through hole 111, and the sealing ring 112 seals the gap between the wire and the first through hole 111. In use, the wire extends to the outside of the lamp housing 100 through the first through hole 111 and is connected to the external power supply in polarity, thereby providing power to the circuit board 200. The wire is sleeved with the sealing ring 112, and the wire and the sealing ring 112 fit tightly. The sealing ring 112 is installed on the first through hole 111 and seals the first through hole 111 together with the wire, reducing the water vapor entering the inside of the lamp housing 100 and protecting the circuit board 200 inside the lamp housing 100.

[0038] It should be noted that the shape of the sealing ring 112 can be varied. In this embodiment, the sealing ring 112 is composed of two coaxial cylinders. The cross-section of one cylinder is larger than the first through hole and is relatively flat, while the cylinder at the other end is relatively long and slender to fit with the first through hole. However, the shape of the sealing ring 112 is not limited to the above embodiment. In some embodiments of this utility model, the sealing ring 112 can be composed of three coaxial cylinders. The cross-section of the cylinders at both ends is larger than the first through hole and is relatively flat, while the middle cylinder is relatively long and slender to fit with the first through hole, and it is "I" shaped in cross-section.

[0039] like Figures 1 to 3 As shown, in some embodiments, a second through hole 113 is provided on the mounting cavity 110. The second through hole 113 is located on the side wall of the mounting cavity 110, and a sealing plug 114 is installed in the second through hole 113 to block the second through hole 113. When the floodlight is put into use, the sealing plug 114 blocks the second through hole 113, sealing the inside of the lamp housing 100, reducing moisture entering the lamp housing 100, and protecting the circuit board 200 inside the lamp housing 100. During the production of the floodlight, the sealing plug 114 can be removed, and the airtightness of the floodlight can be determined by measuring the air pressure after filling the lamp housing 100 with gas.

[0040] like Figures 1 to 3 As shown, in some embodiments, a reflector 400 is disposed within the mounting cavity 110. The reflector 400 is positioned between the circuit board 200 and the diffuser plate 300, and is held and fixed by the inner wall of the mounting cavity 110, the circuit board 200, and the diffuser plate 300. The working surface of the reflector 400 is plated with a metal layer, which has good reflective properties and can reflect and concentrate light. The reflector 400, positioned between the circuit board 200 and the diffuser plate 300, can concentrate the light generated by the LED chip. Compared to not using the reflector 400, this reduces the brightness loss caused by light scattering from the mounting cavity 110, thereby improving the brightness of the floodlight.

[0041] like Figures 1 to 3 As shown, in some embodiments, a mounting bracket 500 is also included. Folding ears 150 are provided on both opposite sides of the mounting portion 140, and the two ends of the mounting bracket 500 are rotatably connected to the two folding ears 150 in a one-to-one correspondence. The folding ears 150 are folded plates that fold backwards from the mounting portion 140 and are provided with holes. The mounting bracket 500 has holes corresponding to the holes in the folding ears 150, allowing the mounting bracket 500 to be connected to the folding ears 150 using threaded fasteners. The mounting bracket 500 also has holes that do not correspond to the holes in the folding ears 150, for use with threaded fasteners to fix the mounting bracket 500 to the external environment.

[0042] It should be noted that the fixed manner of the mounting rack 500 with the external environment is not limited to only using the hole position on the mounting rack to match the threaded part to realize the connection. In addition to the traditional threaded part connection mode, in some embodiments of the present application, the mounting rack 500 can also be designed in the form of a bracket with a base. This design enables the lamp shell 100 to be stably mounted on the mounting rack 500, and the mounting rack 500 itself is directly placed on the ground through its base, without the need for complex wall or ground punching, mounting threaded parts and other tedious operations, improving the installation efficiency and reducing the damage and pollution to the installation environment.

[0043] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

Claims

1. A light projector, characterized by comprising: The application relates to a lamp shell (100) with a mounting cavity (110) provided with a circuit board (200) provided with LED chips capable of emitting light when electrified. The lamp shell (100) is provided with a heat dissipation block (120) at a position corresponding to the circuit board (200), the heat dissipation block (120) is provided with a threaded hole (121), and the circuit board (200) is connected with the threaded hole (121) of the heat dissipation block (120) through a threaded fastener. The heat dissipation block (120) is arranged on the outer bottom wall of the lamp shell (100), and the heat dissipation block (120) and the lamp shell (100) are in an integrated structure, the heat dissipation block (120) is provided with heat dissipation fins on the outer wall, and the circuit board (200) is tightly attached to the inner bottom wall of the mounting cavity (110).

2. The light projector according to claim 1, wherein The lamp shell (100) is formed by pressure casting or injection molding, the lamp shell (100) is provided with a light outlet (130) communicating with the mounting cavity (110), and the LED chips on the circuit board (200) face the light outlet (130).

3. The light projector according to claim 2, wherein The lamp shell (100) is provided with a mounting portion (140) arranged in the circumferential direction of the light outlet (130) at the light outlet (130), the mounting portion (140) is provided with a diffusion plate (300), and the diffusion plate (300) covers the light outlet (130).

4. The light projector of claim 3, wherein the light projector is configured to: The mounting portion (140) is provided with a mounting groove (141), and the diffusion plate (300) is embedded in the mounting groove (141).

5. The light projector of claim 4, wherein the light projector is configured to: The bottom wall of the mounting groove (141) is provided with an annular groove (143) arranged in the circumferential direction of the light outlet (130), when the diffusion plate (300) is embedded in the mounting groove (141), the annular groove (143) is filled with adhesive, and the diffusion plate (300) is tightly attached to the bottom wall of the mounting groove (141) through the adhesive.

6. The light projector of claim 5, wherein the light projector is configured to: A first through hole (111) is formed in the side wall of the mounting cavity (110), the circuit board is provided with a wire for connecting a power supply, the wire passes through the first through hole (111) and extends to the outside of the lamp shell (100), the wire is sleeved with a sealing ring (112) located in the first through hole (111), and the sealing ring (112) seals the gap between the wire and the first through hole (111).

7. The light projector of claim 1, wherein the light projector is configured to project the image onto the surface in a manner that is substantially uniform across the surface. A second through hole (113) is arranged on the mounting cavity (110), the second through hole (113) is arranged on the side wall of the mounting cavity (110), a sealing plug (114) is arranged in the second through hole (113), and the sealing plug (114) blocks the second through hole (113).

8. The light projector of claim 1, wherein, A light reflecting cup (400) is arranged in the mounting cavity (110), the light reflecting cup (400) is arranged between the circuit board (200) and the diffusion plate (300), and the light reflecting cup (400) is fixed by the inner wall of the mounting cavity (110), the circuit board (200) and the diffusion plate (300).

9. The light projector of claim 4, wherein the light projector is configured to project the image onto the surface in a manner that is substantially uniform across the surface. ​ 10. The light projector of claim 4, wherein the light projector is configured to project the image onto the surface in a manner that is substantially uniform across the surface. The mounting frame (500) is rotatably connected with the two folding ears (150) at two ends.

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